Provided is a composition for a bath agent, which comprises a carbonate and an organic acid, can generate a carbon dioxide gas to exhibit an effect of enhancing the circulation of blood satisfactorily, and is imparted with high storage stability to also exhibit an additional effect satisfactorily. A composition for a bath agent, which comprises the following components: (A) a carbonic acid salt containing 30 mass% or more of a dialkali metal carbonate (A1)； (B) an organic acid； and (C) a CGRP response accelerator.本發明提供一種含有碳酸鹽及有機酸而充分地發揮出利用二氧化碳之產生之血液循環促進效果，並且賦予較高之保存穩定性，藉此亦可充分地發揮出附加效果的沐浴用劑組合物。本發明之沐浴用劑組合物含有如下成分(A)包含碳酸二鹼金屬鹽(A1)30質量%以上之碳酸鹽、(B)有機酸、及(C)CGRP應答促進劑。
